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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MP9361DJ-LF-P

Name: MP9361DJ-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MP9361DJ-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP9361DJ-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-23-6 Thin, TSOT-23-6

Datasheet:: MP9361DJ-LF-P.pdf

Description:: IC REG CHARGE PUMP 5V TSOT23-6

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Product details

Overview

MP9361DJ-LF-P from Monolithic Power Systems is a regulated 2× charge pump DC/DC converter delivering a fixed 5V output with ±200mV regulation window, 110mA maximum load current, and 30mV peak-to-peak ripple at 60mA load. It operates from 2.8V to 5V input without inductors and integrates soft-start, over-current, short-circuit, and thermal protection for LED backlight and display power rails in compact portable devices.

For engineers reviewing the MP9361DJ-LF-P datasheet, MP9361DJ-LF-P pinout, MP9361DJ-LF-P application, or MP9361DJ-LF-P equivalent, key selection criteria include its fixed 5V output accuracy, TSOT23-6 footprint compatibility, 1.35MHz switching frequency impact on EMI filtering, and in-rush current limiting during enable transitions in battery-powered systems.

Technical Context

The MP9361DJ-LF-P implements a regulated switched-capacitor doubler topology with internal voltage sensing via a precision resistor divider and comparator-based mode control. Regulation is maintained by enabling the charge pump only when VOUT drops below the 4.8V threshold, ensuring stable 5V output across input and load variations.

Its 1.35MHz fixed-frequency oscillator drives low-loss MOSFET switches optimized for ceramic flying capacitors (CP/CN), while integrated thermal shutdown activates at ~145°C junction temperature and disables all switching until fault clearance.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 5.0V ±200mV; ensures consistent bias for white LEDs and LCD bias circuits without external feedback.
Max Output Current	110mA continuous; supports up to 4 parallel white LEDs at 25mA each with margin.
Input Range	2.8V to 5.0V; compatible with single-cell Li-ion (3.0–4.2V) and USB-powered systems.
Switching Frequency	1.35MHz typical; enables use of small 0.22µF flying capacitor and reduces EMI filter size.
Output Ripple	30mV_PP at 60mA; meets noise-sensitive analog supply requirements for camera sensor bias rails.
Quiescent Current	2–4mA; minimizes standby power loss in always-on display subsystems.
Enable Threshold	V_EN(HI) = 1.5V, V_EN(LO) = 0.4V; compatible with standard GPIO logic levels from 1.8V/3.3V microcontrollers.

Pinout & Package

MP9361DJ-LF-P is housed in a lead-free TSOT23-6 package (1.6mm × 2.9mm × 0.85mm), optimized for high-density portable PCB layouts and reflow-compatible assembly.

Pin/Terminal	Circuit Role	Design Meaning
1 OUT	Regulated output node	Delivers 5V to load; requires ≥2.2µF ceramic decoupling (10µF for >60mA).
2 GND	Power ground reference	Low-impedance return path for charge pump switching currents; must be connected directly to PCB ground plane.
3 EN	Logic-enable control input	Active-high digital enable; pulls device into ultra-low-shutdown mode (<1µA) when <0.4V.
4 CN	Flying capacitor negative terminal	AC-coupled node for charge transfer; connects to negative side of 0.22µF flying capacitor.
5 IN	Input power supply	Accepts 2.8–5.0V source; requires local 2.2µF ceramic input capacitor adjacent to pin.
6 CP	Flying capacitor positive terminal	AC-coupled node for charge transfer; connects to positive side of 0.22µF flying capacitor.

Key Features

Feature	Design Value
Inductorless architecture	Eliminates magnetic components, reducing BOM cost and board area by >30% vs. buck-boost solutions.
Internal soft-start	Gradually ramps output voltage over ~1ms, limiting in-rush current to <200mA during startup and mode transitions.
Thermal shutdown	Auto-recovery protection triggers at ~145°C junction temperature, preventing permanent damage under sustained overload.
Short-circuit protection	Limits output current to 60–90mA during hard shorts, maintaining safe power dissipation in TSOT23-6 package.

Applications

Smartphone LED Backlight

Portable Camera Flash

Use Scenario: Driving 2–4 white LEDs in series for main display backlight in sub-5mm-thin smartphones.

IC Role / Device Role / Timing Role: Regulated 5V charge pump supplying constant-current LED driver IC input rail.

Use Value: Delivers stable 5V at 110mA with <30mV ripple, enabling flicker-free display operation without inductor-induced EMI.

Use Scenario: Providing high-efficiency 5V rail for flash LED driver IC in compact handheld cameras.

IC Role / Device Role / Timing Role: Fixed-output charge pump powering flash controller with fast enable/disable response for burst illumination.

Use Value: Soft-start and in-rush limiting prevent battery voltage sag during flash activation, preserving system stability.

LCD Bias Supply

TV Remote Display

Use Scenario: Generating clean 5V bias for segment LCD drivers in medical handheld instruments.

IC Role / Device Role / Timing Role: Low-noise regulated supply for LCD V_COM/V_SEG generation circuitry.

Use Value: 30mV ripple ensures contrast consistency across display segments without visible artifacts.

Use Scenario: Powering segmented LCD and IR LED driver in energy-constrained TV remote controls.

IC Role / Device Role / Timing Role: Primary 5V rail generator from single alkaline cell (1.5V) boosted via charge pump.

Use Value: 2.8V minimum input allows operation down to 1.4V/cell with boost efficiency >85% at light loads.

Equivalent & Alternatives

The following parts are listed as comparable options for similar regulated charge pump applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS60403DBVR	Fixed 5V output, 60mA max, 1MHz switching, SOT23-5 package	Lower output current and no EN pin; lacks short-circuit protection	Select when board space permits larger flying caps and load current ≤60mA
MAX682ESA+	Adjustable output (1.5–5.5V), 100mA max, 1.2MHz, SO8 package	Requires external resistors for feedback; larger footprint and higher quiescent current (15µA)	Choose when programmable output voltage is required for multi-rail systems

Compared with TPS60403DBVR and MAX682ESA+, MP9361DJ-LF-P delivers 110mA at 5V with integrated EN control and robust protection in the smallest footprint-making it optimal for space-constrained, high-reliability LED and display power applications.

Availability

MP9361DJ-LF-P is available at Aetrix Electronics and suitable for smartphone LED backlight, portable camera flash, and LCD bias supply applications requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MP9361DJ-LF-P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with design centers in the US, China, and Taiwan.

The MP9361 belongs to MPS's regulated charge pump product line, engineered specifically for compact, inductorless DC/DC conversion in battery-powered displays and lighting systems where size, efficiency, and reliability are critical.

FAQ

What is the minimum input voltage required for MP9361DJ-LF-P to regulate 5V output?

The MP9361DJ-LF-P requires a minimum input voltage of 2.8V to maintain regulated 5V output. Below this, regulation fails and output drops proportionally. This threshold ensures compatibility with discharged single-cell Li-ion batteries (≥2.8V) and two-alkaline-cell supplies (≥3.0V).

Can MP9361DJ-LF-P drive more than 110mA continuously?

No. The MP9361DJ-LF-P is rated for 110mA maximum continuous output current. Exceeding this triggers over-current protection, limiting output to 250–500mA depending on thermal conditions. Sustained overload causes thermal shutdown at ~145°C junction temperature.

Which flying capacitor value is recommended for MP9361DJ-LF-P?

A 0.22µF X7R ceramic capacitor is specified for CP and CN terminals. It must be placed as close as possible to pins 4 and 6, with low-ESR construction. Larger values (e.g., 0.47µF) reduce ripple but increase start-up time and may affect stability.

Does MP9361DJ-LF-P require an external feedback network?

No. MP9361DJ-LF-P provides a fixed 5V output using an internal resistor divider and error amplifier. No external resistors or compensation components are needed-simplifying layout and reducing BOM count versus adjustable regulators.

How does the EN pin behave during logic transitions?

The EN pin has a 1.5V turn-on threshold and 0.4V turn-off threshold with hysteresis. When pulled above 1.5V, the device starts with soft-start; when pulled below 0.4V, it enters shutdown drawing <1µA. Fast GPIO edges (≤100ns) ensure reliable mode switching without glitches.

Is MP9361DJ-LF-P suitable for automotive applications?

No. MP9361DJ-LF-P is rated for –40°C to +85°C ambient operation and lacks AEC-Q200 qualification, automotive-grade screening, or extended temperature range. It is intended for consumer portable electronics, not under-hood or safety-critical automotive systems.

MP9361DJ-LF-P Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: SOT-23-6 Thin, TSOT-23-6

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Up

Output Configuration:: Positive

Topology:: Charge Pump

Output Type:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 2.8V

Voltage - Input (Max):: 5V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 110mA

Frequency - Switching:: 1.35MHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TSOT-23-6

MP9361DJ-LF-P FAQ

1.How can I place an order for MP9361DJ-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP9361DJ-LF-P on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MP9361DJ-LF-P reliable?

The price and inventory of MP9361DJ-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP9361DJ-LF-P is usually 5 days.

3.What payment methods are accepted for MP9361DJ-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP9361DJ-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP9361DJ-LF-P?

MP9361DJ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP9361DJ-LF-P order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MP9361DJ-LF-P?

For technical support, including MP9361DJ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP9361DJ-LF-P requirements.

6.How does Aetrix verify that MP9361DJ-LF-P is sourced from the original manufacturer or authorized distributors?

All MP9361DJ-LF-P products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP9361DJ-LF-P meets industry standards.

7.What is the process for return or replacement of MP9361DJ-LF-P?

All MP9361DJ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP9361DJ-LF-P, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MP9361DJ-LF-P part is unused and in its original packaging.

Return procedure for MP9361DJ-LF-P:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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